Games may report different things, sometimes they even report virtual vram in Vista/7 as actual vram. There is still only 2GB usable regardless of what the games say. Even so, 2GB is enough for everything out today. GTA4 with 100% view distance @ 2560x1600 reports using only 1640MB. I also did some tests in XP on Oblivion with QTP3 and an ultra high view distance mod @ 2560x1600 with 16xQ AA and rivatuner showed between 1100-1200MB used.